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CONDENSED CONSOLIDATED STATEMENTS OF STOCKHOLDERS' EQUITY - UNAUDITED - USD ($) $ in Thousands | Total | Common Stock | Additional Paid-in Capital | Additional Paid-in Capital Adjustments due to adoption of new accounting standards | Treasury Stock | Accumulated Other Comprehensive Income (Loss) | Accumulated Earnings | Accumulated Earnings Adjustments due to adoption of new accounting standards | Noncontrolling Interest
--- | --- | --- | --- | --- | --- | --- | --- | --- | ---
Balance, beginning of period at Dec. 31, 2020 | $ 422,395 | $ 700 | $ 470,557 |  | $ (894,126) | $ (31,138) | $ 876,402 |  | $ 0
Balance, beginning of period, shares at Dec. 31, 2020 |  | 32,713,000 |  |  |  |  |  |  |
Net income |  |  |  |  |  |  | 19,631 |  |
Unrealized gain (loss) on short-term investments, net of tax |  |  |  |  |  | (6) |  |  |
Foreign currency translation adjustments |  |  |  |  |  | (355) |  |  |
Total comprehensive income (loss), net of tax | 19,270 |  |  |  |  |  |  |  |
Repurchase of common stock | (11,721) | $ (1) | (5,202) |  | (6,518) |  |  |  |
Repurchase of common stock, shares |  | (252,000) |  |  |  |  |  |  |
Issuance of common stock pursuant to employee stock purchase plan | 619 |  | 619 |  |  |  |  |  |
Issuance of common stock pursuant to employee stock purchase plan, shares |  | 16,000 |  |  |  |  |  |  |
Issuance of restricted common stock pursuant to stock-based compensation plans |  | $ 5 | (5) |  |  |  |  |  |
Issuance of restricted common stock pursuant to stock-based compensation plans, shares |  | 487,000 |  |  |  |  |  |  |
Cancellation of restricted common stock issued pursuant to stock-based compensation plans, shares |  | (1,000) |  |  |  |  |  |  |
Stock-based compensation expense | 5,395 |  | 5,395 |  |  |  |  |  |
Dividends | (8,243) |  |  |  |  |  | (8,243) |  |
Balance, ending of period at Mar. 31, 2021 | 427,715 | $ 704 | 471,364 |  | (900,644) | (31,499) | 887,790 |  |
Balance, ending of period, shares at Mar. 31, 2021 |  | 32,963,000 |  |  |  |  |  |  |
Balance, beginning of period at Dec. 31, 2020 | 422,395 | $ 700 | 470,557 |  | (894,126) | (31,138) | 876,402 |  | 0
Balance, beginning of period, shares at Dec. 31, 2020 |  | 32,713,000 |  |  |  |  |  |  |
Net income | 38,952 |  |  |  |  |  |  |  |
Unrealized gain (loss) on short-term investments, net of tax | (13) |  |  |  |  |  |  |  |
Foreign currency translation adjustments | 1,857 |  |  |  |  |  |  |  |
Total comprehensive income (loss), net of tax | 40,796 |  |  |  |  |  |  |  |
Balance, ending of period at Jun. 30, 2021 | 439,780 | $ 704 | 477,010 |  | (907,601) | (29,294) | 898,961 |  | 0
Balance, ending of period, shares at Jun. 30, 2021 |  | 32,797,000 |  |  |  |  |  |  |
Balance, beginning of period at Mar. 31, 2021 | 427,715 | $ 704 | 471,364 |  | (900,644) | (31,499) | 887,790 |  |
Balance, beginning of period, shares at Mar. 31, 2021 |  | 32,963,000 |  |  |  |  |  |  |
Net income | 19,321 |  |  |  |  |  | 19,321 |  |
Unrealized gain (loss) on short-term investments, net of tax | (7) |  |  |  |  | (7) |  |  |
Foreign currency translation adjustments | 2,212 |  |  |  |  | 2,212 |  |  |
Total comprehensive income (loss), net of tax | 21,526 |  |  |  |  |  |  |  |
Repurchase of common stock | (7,049) |  | (92) |  | (6,957) |  |  |  |
Repurchase of common stock, shares |  | (156,000) |  |  |  |  |  |  |
Issuance of common stock pursuant to employee stock purchase plan | 716 |  | 716 |  |  |  |  |  |
Issuance of common stock pursuant to employee stock purchase plan, shares |  | 19,000 |  |  |  |  |  |  |
Issuance of restricted common stock pursuant to stock-based compensation plans, shares |  | 6,000 |  |  |  |  |  |  |
Cancellation of restricted common stock issued pursuant to stock-based compensation plans, shares |  | (35,000) |  |  |  |  |  |  |
Stock-based compensation expense | 5,022 |  | 5,022 |  |  |  |  |  |
Dividends | (8,150) |  |  |  |  |  | (8,150) |  |
Balance, ending of period at Jun. 30, 2021 | 439,780 | $ 704 | 477,010 |  | (907,601) | (29,294) | 898,961 |  | 0
Balance, ending of period, shares at Jun. 30, 2021 |  | 32,797,000 |  |  |  |  |  |  |
Balance, beginning of period at Dec. 31, 2021 | $ 440,244 | $ 705 | 488,303 | $ (9,802) | (930,106) | (38,353) | 916,060 | $ 9,802 | 3,635
Balance, beginning of period, shares at Dec. 31, 2021 | 32,495,000 | 32,495,000 |  |  |  |  |  |  |
Net income |  |  |  |  |  |  | 6,113 |  |
Unrealized gain (loss) on short-term investments, net of tax |  |  |  |  |  | (2) |  |  |
Foreign currency translation adjustments |  |  |  |  |  | (1,182) |  |  |
Total comprehensive income (loss), net of tax | $ 4,929 |  |  |  |  |  |  |  |
Repurchase of common stock | (23,801) | $ (1) | (7,804) |  | (15,996) |  |  |  |
Repurchase of common stock, shares |  | (389,000) |  |  |  |  |  |  |
Issuance of common stock pursuant to employee stock purchase plan | 650 |  | 650 |  |  |  |  |  |
Issuance of common stock pursuant to employee stock purchase plan, shares |  | 12,000 |  |  |  |  |  |  |
Issuance of restricted common stock pursuant to stock-based compensation plans |  | $ 5 | (5) |  |  |  |  |  |
Issuance of restricted common stock pursuant to stock-based compensation plans, shares |  | 476,000 |  |  |  |  |  |  |
Cancellation of restricted common stock issued pursuant to stock-based compensation plans, shares |  | (34,000) |  |  |  |  |  |  |
Stock-based compensation expense | 5,581 |  | 5,581 |  |  |  |  |  |
Settlement of convertible debt securities, net of tax | (4,845) |  | (4,845) |  |  |  |  |  |
Dividends | (8,586) |  |  |  |  |  | (8,586) |  |
Balance, ending of period at Mar. 31, 2022 | 414,172 | $ 709 | 472,078 |  | (946,102) | (39,537) | 923,389 |  | 3,635
Balance, ending of period, shares at Mar. 31, 2022 |  | 32,560,000 |  |  |  |  |  |  |
Balance, beginning of period at Dec. 31, 2021 | $ 440,244 | $ 705 | 488,303 | $ (9,802) | (930,106) | (38,353) | 916,060 | $ 9,802 | 3,635
Balance, beginning of period, shares at Dec. 31, 2021 | 32,495,000 | 32,495,000 |  |  |  |  |  |  |
Net income | $ 11,430 |  |  |  |  |  |  |  |
Unrealized gain (loss) on short-term investments, net of tax | 3 |  |  |  |  |  |  |  |
Foreign currency translation adjustments | (17,182) |  |  |  |  |  |  |  |
Total comprehensive income (loss), net of tax | (5,749) |  |  |  |  |  |  |  |
Balance, ending of period at Jun. 30, 2022 | $ 377,022 | $ 709 | 479,271 |  | (967,659) | (55,532) | 920,233 |  | 0
Balance, ending of period, shares at Jun. 30, 2022 | 32,195,000 | 32,195,000 |  |  |  |  |  |  |
Balance, beginning of period at Mar. 31, 2022 | $ 414,172 | $ 709 | 472,078 |  | (946,102) | (39,537) | 923,389 |  | 3,635
Balance, beginning of period, shares at Mar. 31, 2022 |  | 32,560,000 |  |  |  |  |  |  |
Net income | 5,317 |  |  |  |  |  | (5,317) |  |
Unrealized gain (loss) on short-term investments, net of tax | 5 |  |  |  |  | 5 |  |  |
Foreign currency translation adjustments | (16,000) |  |  |  |  | (16,000) |  |  |
Total comprehensive income (loss), net of tax | (10,678) |  |  |  |  |  |  |  |
Repurchase of common stock | (21,673) |  | (116) |  | (21,557) |  |  |  |
Repurchase of common stock, shares |  | (362,000) |  |  |  |  |  |  |
Issuance of common stock pursuant to employee stock purchase plan | 773 |  | 773 |  |  |  |  |  |
Issuance of common stock pursuant to employee stock purchase plan, shares |  | 15,000 |  |  |  |  |  |  |
Issuance of restricted common stock pursuant to stock-based compensation plans |  | $ 1 | (1) |  |  |  |  |  |
Issuance of restricted common stock pursuant to stock-based compensation plans, shares |  | 42,000 |  |  |  |  |  |  |
Cancellation of restricted common stock issued pursuant to stock-based compensation plans |  | $ (1) | 1 |  |  |  |  |  |
Cancellation of restricted common stock issued pursuant to stock-based compensation plans, shares |  | (60,000) |  |  |  |  |  |  |
Stock-based compensation expense | 6,536 |  | 6,536 |  |  |  |  |  |
Dividends | (8,473) |  |  |  |  |  | (8,473) |  |
Write-off of noncontrolling interest | (3,635) |  |  |  |  |  |  |  | (3,635)
Balance, ending of period at Jun. 30, 2022 | $ 377,022 | $ 709 | $ 479,271 |  | $ (967,659) | $ (55,532) | $ 920,233 |  | $ 0
Balance, ending of period, shares at Jun. 30, 2022 | 32,195,000 | 32,195,000 |  |  |  |  |  |  |

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